Patent Number: 6,167,252

Title: Security for a mobile or personal communications device having an identification code

Abstract: A device that broadcasts an electronic serial number, or ESN, is made secure from cloning using one or more of a plurality of measures, including coupling the memory used for storing the ESN more closely to the ESN processor, fabricating the ESN memory as part of the ESN processor, including the ESN memory in another processor and encrypting communications between the other processor and the ESN processor, and comparing multiple copies of the ESN stored in different memories. The later technique is also effective in securing the JTAG port of an ESN processor.

Inventors: Cohen; Paul E. (San Jose, CA)

Assignee: NEC Electronics, Inc.

International Classification: H04Q 7/32 (20060101); H04M 011/00 ()

Expiration Date: 12/26/2013